<html>
<title></title>
<style>
#key:nth-child(odd){
	height: 80px;
	width: 140px;
	/*margin-top: 20px;*/
	background-color: red;
  overflow: hidden;
}
#key:nth-child(even){
	height: 80px;
	width: 140px;
	/*margin-top: 20px;*/
	background-color: black;
  overflow: hidden;
}
ul{
	display: none;
	color:orange;
	float: left;
	list-style: none;
}
</style>
<script src='js/jquery-1.8.3.min.js'></script>
<button id='start'>Start</button>
<button id='end'>End</button>
<div id='total'>

<div id='key'>

</div>

<script>

$(function($) {




});
</script>
</html>
